- Child with ABRS with inflammation as bacterial infection who has the following symptoms/signs on the day of or the day before the first dose of the investigational product: Redness of the nasal mucosa; nasal or postnasal discharge is purulent or mucopurulent; Pathological shadow in the paranasal sinus on a radiogram (only for reference). Patient with surgical history should be excluded but patient with a pervious surgery more than 365 days before and apparently preserved maxillary sinus mucosa or patient with a previous surgery of nasal polypectomy more than 90 days before may be enrolled in the study.